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Is it possible to get $\ce K$ from $\ce K{O_2}$ using a synthesis reaction? If yes, can you describe it?

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    $\begingroup$ I suppose easier and/or cheaper ways are preferred. KO2 assumes it has (probably) already been K once. It is like to isolate K twice. // Attempts to post the most laconic question ever are at risk they will be closed and most users will not notice them. How do I ask a good question. $\endgroup$
    – Poutnik
    Nov 24 '21 at 8:04
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    $\begingroup$ $\ce{KO2}$ is a dangerous and explosive substance. Don't use it. Better destroy it in large amounts of water. $\endgroup$
    – Maurice
    Nov 24 '21 at 8:39
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Thermal decomposition should help but it requires very high temperature. It goes through various oxides and ultimately decompose to potassium.

$$\ce{KO2 ->[<400 ^\circ C] non-stoichiometric oxides ->[400-480 ^\circ C] K2O2 ->[500 ^\circ C] K2O ->[560 ^\circ C] K (+oxygen ^)}$$

Do note the reaction is performed in vacuum otherwise it can oxidized back to peroxide/superoxide.

Ref. STUDIES OF THE THERMAL DECOMPOSITION OF THE POTASSIUM OXIDES IN THE TEMPERATURE RANGE 300--480 DEGREES C, RILEY, JOHN F. 1968. (link)

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